GNU bug report logs - #17267
24.3.50; 100% cpu usage of emacs when copy some lines to org buffer

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Jingtao Xu <jingtaozf <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.3.50; 100% cpu usage of emacs when copy some lines to org buffer
Date: Tue, 15 Apr 2014 15:46:13 +0800

I wrote one elisp function to collect the code changes of a svn diff file:
=============================================================================================
(defun my-svn-codes-changes (&optional proj)
  (interactive)
  (if (null proj)
    (setf proj (my-select-project)))
  (with-current-buffer (find-file-noselect (my-path proj (concat (my-p-id proj) ".diff")))
    (fundamental-mode)
    (goto-char (point-min))
    (let (result-list cur-file cur-file-changes)
      (while (search-forward "Index: " nil t)
        (setf cur-file (buffer-substring-no-properties (point) (line-end-position)))
        (next-line 3)
        ;;(loop repeat 3 do (next-line))
        (let ((start-pos (line-beginning-position))
              (end-pos (point-max)))
          (when (search-forward "Index: " nil t)
            (previous-line)
            (setf end-pos (line-end-position)))
          (setf cur-file-changes (buffer-substring-no-properties start-pos end-pos))
          (push (cons cur-file cur-file-changes) result-list)
          (goto-char end-pos)))
      (reverse result-list))))
=============================================================================================
It works fine in emacs 24.3.1,but in emacs 24.3.50,it will enter into an infinite loop and never return.

I debugged emacs source code and find the infinite loop seems to happen in c function handle_stop,of file xdisp.c.
emacs nerver return from this function,and in handle_stop,when it call function handle_invisible_prop,it will
return HANDLED_RECOMPUTE_PROPS.




In GNU Emacs 24.3.50.1 (x86_64-unknown-linux-gnu, GTK+ Version 3.10.7)
 of 2014-04-15 on mini.funtoo
Windowing system distributor `The X.Org Foundation', version 11.0.11403000
Important settings:
  value of $LC_COLLATE: POSIX
  value of $LC_CTYPE: zh_CN.UTF-8
  value of $LANG: en_US.UTF-8
  value of $XMODIFIERS: @im=fcitx
  locale-coding-system: utf-8

Major mode: Lisp Interaction

Minor modes in effect:
  show-paren-mode: t
  global-eclim-mode: t
  savehist-mode: t
  recentf-mode: t
  ido-everywhere: t
  tabbar-mode: t
  global-auto-revert-mode: t
  Info-breadcrumbs-in-mode-line-mode: t
  global-company-mode: t
  company-mode: t
  global-auto-complete-mode: t
  auto-complete-mode: t
  yas/global-mode: t
  yas/minor-mode: t
  anything-dired-mode: Enable anything completion in Dired functions.
Bindings affected are C, R, S, H.
This is deprecated for Emacs24+ users, use `ac-mode' instead.
  auto-image-file-mode: t
  winner-mode: t
  display-time-mode: t
  evil-mode: t
  evil-local-mode: t
  pretty-lambda-mode: t
  shell-dirtrack-mode: t
  eldoc-mode: t
  which-function-mode: t
  tooltip-mode: t
  electric-indent-mode: t
  menu-bar-mode: t
  file-name-shadow-mode: t
  global-font-lock-mode: t
  font-lock-mode: t
  auto-composition-mode: t
  auto-encryption-mode: t
  auto-compression-mode: t
  column-number-mode: t
  line-number-mode: t
  transient-mark-mode: t
  abbrev-mode: t

Recent input:
<down-mouse-1> <mouse-movement> <mouse-1> <help-echo> 
<help-echo> <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <menu-bar> <help-menu> <send-emacs-bug-report> 
1 0 0 % SPC c p u SPC u s a g e SPC o f SPC e m a c 
s SPC w h e n SPC c o p y SPC s o m e SPC l i n e s 
SPC t o SPC o r g SPC b u f f e r <return> T h s SPC 
C-g a <backspace> i s SPC C-g s C-g C-c C-k y C-x C-c 
C-g s 1 <help-echo> <help-echo> <help-echo> <help-echo> 
<help-echo> <help-echo> <help-echo> <menu-bar> <help-menu> 
<send-emacs-bug-report>

Recent messages:
Checking 70 files in /home/projects/emacs/lisp/erc...
Checking 48 files in /home/projects/emacs/lisp/emulation...
Checking 153 files in /home/projects/emacs/lisp/emacs-lisp...
Checking 57 files in /home/projects/emacs/lisp/calendar...
Checking 87 files in /home/projects/emacs/lisp/calc...
Checking 95 files in /home/projects/emacs/lisp/obsolete...
Checking for load-path shadows...done
Quit [3 times]
Message modified; kill anyway? (y or n) y
(No files need saving) [2 times]
Quit

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Features:
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Memory information:
((conses 16 750367 50412)
 (symbols 48 61076 19)
 (miscs 40 145 312)
 (strings 32 133650 16576)
 (string-bytes 1 4156385)
 (vectors 16 41594)
 (vector-slots 8 940400 10499)
 (floats 8 2153 95)
 (intervals 56 576 0)
 (buffers 960 20)
 (heap 1024 47248 2541))

-- 

___________________________________
With Best Regards.
jingtao.

Message #8 received at 17267 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jingtao Xu <jingtaozf <at> gmail.com>
Cc: 17267 <at> debbugs.gnu.org
Subject: Re: bug#17267: 24.3.50;
 100% cpu usage of emacs when copy some lines to org buffer
Date: Tue, 15 Apr 2014 12:30:21 +0300

> From: Jingtao Xu <jingtaozf <at> gmail.com>
> Date: Tue, 15 Apr 2014 15:46:13 +0800
> 
> 
> I wrote one elisp function to collect the code changes of a svn diff file:
> =============================================================================================
> (defun my-svn-codes-changes (&optional proj)
>   (interactive)
>   (if (null proj)
>     (setf proj (my-select-project)))
>   (with-current-buffer (find-file-noselect (my-path proj (concat (my-p-id proj) ".diff")))
>     (fundamental-mode)
>     (goto-char (point-min))
>     (let (result-list cur-file cur-file-changes)
>       (while (search-forward "Index: " nil t)
>         (setf cur-file (buffer-substring-no-properties (point) (line-end-position)))
>         (next-line 3)
>         ;;(loop repeat 3 do (next-line))
>         (let ((start-pos (line-beginning-position))
>               (end-pos (point-max)))
>           (when (search-forward "Index: " nil t)
>             (previous-line)
>             (setf end-pos (line-end-position)))
>           (setf cur-file-changes (buffer-substring-no-properties start-pos end-pos))
>           (push (cons cur-file cur-file-changes) result-list)
>           (goto-char end-pos)))
>       (reverse result-list))))
> =============================================================================================
> It works fine in emacs 24.3.1,but in emacs 24.3.50,it will enter into an infinite loop and never return.
> 
> I debugged emacs source code and find the infinite loop seems to happen in c function handle_stop,of file xdisp.c.
> emacs nerver return from this function,and in handle_stop,when it call function handle_invisible_prop,it will
> return HANDLED_RECOMPUTE_PROPS.

Sorry, I don't see any obvious relation between the above function and
the part of xdisp.c where you see the infloop.  Is it possible for you
to construct a reproducible recipe for this bug, starting with "emacs -Q",
including any external files necessary for reproducing the bug?  If so,
please post the recipe and the files here.

Thanks.

Message #11 received at 17267 <at> debbugs.gnu.org (full text, mbox):

From: Jingtao Xu <jingtaozf <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 17267 <at> debbugs.gnu.org
Subject: Re: bug#17267: 24.3.50; 100% cpu usage of emacs when copy some lines
 to org buffer
Date: Wed, 16 Apr 2014 14:18:18 +0800

[Message part 1 (text/plain, inline)]

I create test files /tmp/test.el and /tmp/test.diff,see them in attach.

Then I start emacs with -q and create a empty file /tmp/test.org,and
press M-x then invoke function "my-changes",it fails with error
"line-move: Args out of range: 160, 160".
But If I invoke this function in buffer test.el,it runs fine.

Of course it's not a bug of 100% cpu usage,but It also works fine in
my old emacs whether I invoke this command in buffer test.org or not.

Hope this help you indicate the issue position.
Thanks.

With Best Regards.
jingtao.


-------------------------------------------------------------------------------------------------------------------------

On Tue, Apr 15, 2014 at 5:30 PM, Eli Zaretskii <eliz <at> gnu.org> wrote:
>> From: Jingtao Xu <jingtaozf <at> gmail.com>
>> Date: Tue, 15 Apr 2014 15:46:13 +0800
>>
>>
>> I wrote one elisp function to collect the code changes of a svn diff file:
>> =============================================================================================
>> (defun my-svn-codes-changes (&optional proj)
>>   (interactive)
>>   (if (null proj)
>>     (setf proj (my-select-project)))
>>   (with-current-buffer (find-file-noselect (my-path proj (concat (my-p-id proj) ".diff")))
>>     (fundamental-mode)
>>     (goto-char (point-min))
>>     (let (result-list cur-file cur-file-changes)
>>       (while (search-forward "Index: " nil t)
>>         (setf cur-file (buffer-substring-no-properties (point) (line-end-position)))
>>         (next-line 3)
>>         ;;(loop repeat 3 do (next-line))
>>         (let ((start-pos (line-beginning-position))
>>               (end-pos (point-max)))
>>           (when (search-forward "Index: " nil t)
>>             (previous-line)
>>             (setf end-pos (line-end-position)))
>>           (setf cur-file-changes (buffer-substring-no-properties start-pos end-pos))
>>           (push (cons cur-file cur-file-changes) result-list)
>>           (goto-char end-pos)))
>>       (reverse result-list))))
>> =============================================================================================
>> It works fine in emacs 24.3.1,but in emacs 24.3.50,it will enter into an infinite loop and never return.
>>
>> I debugged emacs source code and find the infinite loop seems to happen in c function handle_stop,of file xdisp.c.
>> emacs nerver return from this function,and in handle_stop,when it call function handle_invisible_prop,it will
>> return HANDLED_RECOMPUTE_PROPS.
>
> Sorry, I don't see any obvious relation between the above function and
> the part of xdisp.c where you see the infloop.  Is it possible for you
> to construct a reproducible recipe for this bug, starting with "emacs -Q",
> including any external files necessary for reproducing the bug?  If so,
> please post the recipe and the files here.
>
> Thanks.

[test.diff (text/plain, attachment)]

[test.el (text/x-emacs-lisp, attachment)]

Message #14 received at 17267 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jingtao Xu <jingtaozf <at> gmail.com>
Cc: 17267 <at> debbugs.gnu.org
Subject: Re: bug#17267: 24.3.50;
 100% cpu usage of emacs when copy some lines to org buffer
Date: Thu, 17 Apr 2014 12:33:09 +0300

> Date: Wed, 16 Apr 2014 14:18:18 +0800
> From: Jingtao Xu <jingtaozf <at> gmail.com>
> Cc: 17267 <at> debbugs.gnu.org
> 
> I create test files /tmp/test.el and /tmp/test.diff,see them in attach.
> 
> Then I start emacs with -q and create a empty file /tmp/test.org,and
> press M-x then invoke function "my-changes",it fails with error
> "line-move: Args out of range: 160, 160".
> But If I invoke this function in buffer test.el,it runs fine.
> 
> Of course it's not a bug of 100% cpu usage,but It also works fine in
> my old emacs whether I invoke this command in buffer test.org or not.
> 
> Hope this help you indicate the issue position.

Thanks.  Could you please try the patch I posted on the URL below?

  http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17281#20

Message #17 received at 17267 <at> debbugs.gnu.org (full text, mbox):

From: Jingtao Xu <jingtaozf <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 17267 <at> debbugs.gnu.org, Jingtao Xu <jingtaozf <at> gmail.com>
Subject: Re: bug#17267: 24.3.50;
 100% cpu usage of emacs when copy some lines to org buffer
Date: Fri, 18 Apr 2014 14:37:47 +0800

The issue disappeared,then I can continue to use the latest emacs.

Thanks very much!

With Best Regards,
jingtao.

At Thu, 17 Apr 2014 12:33:09 +0300,
Eli Zaretskii wrote:
> 
> > Date: Wed, 16 Apr 2014 14:18:18 +0800
> > From: Jingtao Xu <jingtaozf <at> gmail.com>
> > Cc: 17267 <at> debbugs.gnu.org
> > 
> > I create test files /tmp/test.el and /tmp/test.diff,see them in attach.
> > 
> > Then I start emacs with -q and create a empty file /tmp/test.org,and
> > press M-x then invoke function "my-changes",it fails with error
> > "line-move: Args out of range: 160, 160".
> > But If I invoke this function in buffer test.el,it runs fine.
> > 
> > Of course it's not a bug of 100% cpu usage,but It also works fine in
> > my old emacs whether I invoke this command in buffer test.org or not.
> > 
> > Hope this help you indicate the issue position.
> 
> Thanks.  Could you please try the patch I posted on the URL below?
> 
>   http://debbugs.gnu.org/cgi/bugreport.cgi?bug=17281#20

Message #22 received at 17267-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jingtao Xu <jingtaozf <at> gmail.com>
Cc: 17267-done <at> debbugs.gnu.org
Subject: Re: bug#17267: 24.3.50;
 100% cpu usage of emacs when copy some lines to org buffer
Date: Fri, 18 Apr 2014 09:45:35 +0300

> Date: Fri, 18 Apr 2014 14:37:47 +0800
> From: Jingtao Xu <jingtaozf <at> gmail.com>
> Cc: Jingtao Xu <jingtaozf <at> gmail.com>,
> 	17267 <at> debbugs.gnu.org
> 
> 
> The issue disappeared,then I can continue to use the latest emacs.
> 
> Thanks very much!

Thanks, closing.

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